Remove experimental Unicode support.

This reverts commit 7f0f43e6f9 and some related
subsequent commits.

This compiles, but I have not done extensive testing.

Conflicts:
	include/config.h
	include/decl.h
	include/extern.h
	include/global.h
	include/tradstdc.h
	include/wintty.h
	src/drawing.c
	src/files.c
	src/hacklib.c
	src/mapglyph.c
	src/options.c
	sys/winnt/nttty.c
	win/tty/getline.c
	win/tty/topl.c
	win/tty/wintty.c

include/ntconf.h

@@ -193,11 +193,6 @@ extern void NDECL(toggle_mouse_support);
 extern void FDECL(map_subkeyvalue, (char *));
 extern void NDECL(load_keyboard_handler);
 extern void NDECL(raw_clear_screen);
-# ifdef UNICODE_WIDEWINPORT
-extern void FDECL(xputc, (NHWCHAR_P));
-# else
-extern void FDECL(xputc, (int));
-# endif
 #endif
 
 #include <fcntl.h>